DESCRIPTION The main body ECU (multiplex network body ECU) receives driver door key cylinder lock or unlock switch signals from the front door lock assembly LH. The main body ECU (multiplex network body ECU) activates the door lock motor on each door according to these signals. WIRING DIAGRAM 
CAUTION / NOTICE / HINT NOTICE: When using the Techstream with the ignition switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Main Body. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle. PROCEDURE
(a) Connect the Techstream to the DLC3. (b) Turn the ignition switch to ON. (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Main Body / Data List. (e) Read the Data List according to the display on the Techstream. Main Body
OK: On the Techstream screen, ON or OFF is displayed for each item according to the table above.
(a) Remove the front door lock assembly LH.
(b) Inspect the front door lock assembly LH.
(a) Disconnect the N4 front door lock assembly LH connector. (b) Disconnect the J165 main body ECU (multiplex network body ECU) connector. (c) Measure the resistance according to the value(s) in the table below. Standard Resistance:
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Toyota Tundra Service Manual > Power Window Control System(w/o Jam Protection Function): Key-off Operation Function Operates even if Operating Conditions are not Satisfied
DESCRIPTION When the front doors are closed and the ignition switch is turned from ON to OFF, each power window regulator motor can control its power window operation for approximately 43 +/-1.5 seconds by receiving operation permission signals from the main body ECU (multiplex network body ECU). Ho ...
